<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style type="text/css">
        html {
            font-family: sans-serif;
        }
        body {
            margin: 0;
        }
        header {
            background: purple;
            height: 100px;
        }
        h1 {
            text-align: center;
            color: white;
            line-height: 100px;
            margin: 0;
        }
        article {
            padding: 10px;
            margin: 10px;
            background: aqua;
        }
        section {
            display: flex;
            /*弹性方向*/
            flex-direction: row;
            flex-wrap: wrap;
        }
        article {
            flex: 400px;
        }
        article {
            /*不管多少都一样*/
            flex: 1;
        }
        article:nth-of-type(3) {
            flex: 2;
        }
    </style>
</head>
<body>
<header>
    <h1>Sample flexbox example</h1>
</header>

<section>
    <article>
        <h2>First article</h2>

        <p>Tacos actually microdosing, pour-over semiotics banjo chicharrones retro fanny pack portland everyday carry
            vinyl typewriter. Tacos PBR&B pork belly, everyday carry ennui pickled sriracha normcore hashtag polaroid
            single-origin coffee cold-pressed. PBR&B tattooed trust fund twee, leggings salvia iPhone photo booth health
            goth gastropub hammock.</p>
    </article>

    <article>
        <h2>Second article</h2>

        <p>Tacos actually microdosing, pour-over semiotics banjo chicharrones retro fanny pack portland everyday carry
            vinyl typewriter. Tacos PBR&B pork belly, everyday carry ennui pickled sriracha normcore hashtag polaroid
            single-origin coffee cold-pressed. PBR&B tattooed trust fund twee, leggings salvia iPhone photo booth health
            goth gastropub hammock.</p>
    </article>

    <article>
        <h2>Third article</h2>

        <p>Tacos actually microdosing, pour-over semiotics banjo chicharrones retro fanny pack portland everyday carry
            vinyl typewriter. Tacos PBR&B pork belly, everyday carry ennui pickled sriracha normcore hashtag polaroid
            single-origin coffee cold-pressed. PBR&B tattooed trust fund twee, leggings salvia iPhone photo booth health
            goth gastropub hammock.</p>

        <p>Cray food truck brunch, XOXO +1 keffiyeh pickled chambray waistcoat ennui. Organic small batch paleo 8-bit.
            Intelligentsia umami wayfarers pickled, asymmetrical kombucha letterpress kitsch leggings cold-pressed squid
            chartreuse put a bird on it. Listicle pickled man bun cornhole heirloom art party.</p>
    </article>

    <article>
        <h2>Fourth article</h2>

        <p>Tacos actually microdosing, pour-over semiotics banjo chicharrones retro fanny pack portland everyday carry
            vinyl typewriter. Tacos PBR&B pork belly, everyday carry ennui pickled sriracha normcore hashtag polaroid
            single-origin coffee cold-pressed. PBR&B tattooed trust fund twee, leggings salvia iPhone photo booth health
            goth gastropub hammock.</p>
    </article>

    <article>
        <h2>Fifth article</h2>

        <p>Tacos actually microdosing, pour-over semiotics banjo chicharrones retro fanny pack portland everyday carry
            vinyl typewriter. Tacos PBR&B pork belly, everyday carry ennui pickled sriracha normcore hashtag polaroid
            single-origin coffee cold-pressed. PBR&B tattooed trust fund twee, leggings salvia iPhone photo booth health
            goth gastropub hammock.</p>
    </article>

    <article>
        <h2>Sixth article</h2>

        <p>Tacos actually microdosing, pour-over semiotics banjo chicharrones retro fanny pack portland everyday carry
            vinyl typewriter. Tacos PBR&B pork belly, everyday carry ennui pickled sriracha normcore hashtag polaroid
            single-origin coffee cold-pressed. PBR&B tattooed trust fund twee, leggings salvia iPhone photo booth health
            goth gastropub hammock.</p>

        <p>Cray food truck brunch, XOXO +1 keffiyeh pickled chambray waistcoat ennui. Organic small batch paleo 8-bit.
            Intelligentsia umami wayfarers pickled, asymmetrical kombucha letterpress kitsch leggings cold-pressed squid
            chartreuse put a bird on it. Listicle pickled man bun cornhole heirloom art party.</p>
    </article>

    <article>
        <h2>Seventh article</h2>

        <p>Tacos actually microdosing, pour-over semiotics banjo chicharrones retro fanny pack portland everyday carry
            vinyl typewriter. Tacos PBR&B pork belly, everyday carry ennui pickled sriracha normcore hashtag polaroid
            single-origin coffee cold-pressed. PBR&B tattooed trust fund twee, leggings salvia iPhone photo booth health
            goth gastropub hammock.</p>
    </article>

    <article>
        <h2>Eighth article</h2>

        <p>Tacos actually microdosing, pour-over semiotics banjo chicharrones retro fanny pack portland everyday carry
            vinyl typewriter. Tacos PBR&B pork belly, everyday carry ennui pickled sriracha normcore hashtag polaroid
            single-origin coffee cold-pressed. PBR&B tattooed trust fund twee, leggings salvia iPhone photo booth health
            goth gastropub hammock.</p>
    </article>

    <article>
        <h2>Ninth article</h2>

        <p>Tacos actually microdosing, pour-over semiotics banjo chicharrones retro fanny pack portland everyday carry
            vinyl typewriter. Tacos PBR&B pork belly, everyday carry ennui pickled sriracha normcore hashtag polaroid
            single-origin coffee cold-pressed. PBR&B tattooed trust fund twee, leggings salvia iPhone photo booth health
            goth gastropub hammock.</p>

        <p>Cray food truck brunch, XOXO +1 keffiyeh pickled chambray waistcoat ennui. Organic small batch paleo 8-bit.
            Intelligentsia umami wayfarers pickled, asymmetrical kombucha letterpress kitsch leggings cold-pressed squid
            chartreuse put a bird on it. Listicle pickled man bun cornhole heirloom art party.</p>
    </article>

    <article>
        <h2>Tenth article</h2>

        <p>Tacos actually microdosing, pour-over semiotics banjo chicharrones retro fanny pack portland everyday carry
            vinyl typewriter. Tacos PBR&B pork belly, everyday carry ennui pickled sriracha normcore hashtag polaroid
            single-origin coffee cold-pressed. PBR&B tattooed trust fund twee, leggings salvia iPhone photo booth health
            goth gastropub hammock.</p>
    </article>

    <article>
        <h2>Eleventh article</h2>

        <p>Tacos actually microdosing, pour-over semiotics banjo chicharrones retro fanny pack portland everyday carry
            vinyl typewriter. Tacos PBR&B pork belly, everyday carry ennui pickled sriracha normcore hashtag polaroid
            single-origin coffee cold-pressed. PBR&B tattooed trust fund twee, leggings salvia iPhone photo booth health
            goth gastropub hammock.</p>
    </article>

    <article>
        <h2>Twelfth article</h2>

        <p>Tacos actually microdosing, pour-over semiotics banjo chicharrones retro fanny pack portland everyday carry
            vinyl typewriter. Tacos PBR&B pork belly, everyday carry ennui pickled sriracha normcore hashtag polaroid
            single-origin coffee cold-pressed. PBR&B tattooed trust fund twee, leggings salvia iPhone photo booth health
            goth gastropub hammock.</p>

        <p>Cray food truck brunch, XOXO +1 keffiyeh pickled chambray waistcoat ennui. Organic small batch paleo 8-bit.
            Intelligentsia umami wayfarers pickled, asymmetrical kombucha letterpress kitsch leggings cold-pressed squid
            chartreuse put a bird on it. Listicle pickled man bun cornhole heirloom art party.</p>
    </article>
</section>
</body>
</html>